Assigstob



Feb. 5, 1929.

A. N. OTIS SINGEING APPARATUS Filed Oct. 2, 1926 1n\/@ nt 01" Albert N.Otis,

His fittorrwey Patented Feb. 5, i929.

ALBERT N. OTIS, OF

SCI-IENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, ACQRPORATION OF NEW YORK.

SINGEING APPARATUS.

Application filed October 2, 1926. Serial No. 139,202.

My invention relates to singeing apparatus used in singeing textilematerials, and has for its object the provision of simple, reliable andefficient electrically heated singeing apparatus.

More particularly my invention relates to singeing apparatus employingan electrically heated bar as the singeing element, the woven fabricbeing passed over the bar so as to be singed. In one of its aspects myinvention relates to the provision of a singeing bar heated by passingan electric current through it which is sufliciently rigid to withstandthe pressure of the cloth without liexure, which will not warp, and inwhich the heat is generated near the singeing surface where it isimmediately available.

For a'more complete understanding of my invention reference should behad to the accompanying drawing in which Fig. 1 is a plan view'otelectric sin eing apparatus em- ,bodying my invention; Fig. 2 is adiagrammatic view showing the use of the apparatus in singeing cloth '3Fig. 3 is afragmentary view partially in section showing details ofconstruction; Fig.4 is a sectional view along the line e-i of Fig. 1looking in the direction of the arrows; while Figs. 5, 6 and 7 are viewsshowing. details of construction; Fig. 7 being a sectional view alongthe line 7-7 of Fi 6.

Referring to the drawing, in one form of my invention the metallcsingemg bar 10 is made of suitable refractory. electrically insulatingmaterial, such. as fire clay. blocks are secured in end-to-end relationbetween two metallic side bars 14 and 15, shown aschannel irons, theblocks being clamped between the channel irons .menas of suitable bolts16. The bar 10 extends lengthwise of this support formed bythefinsulating blocks, and it is secured at frequent intervals along itslength to the supporting blocks by means of anchors 17. These anchorsare metallic strips which are welded or otherwise secured to the innersideof the singeing bar and extend at right angles to the singeing bar,the inner ends of the anchors being bent over at right angles to formprojections 18 extending alternately in opposite directions and at rightangles to the length of the singeing bar. As shown in Fig. i the anchormembers .17 may be formed of U shaped strips, one side of each stripbeing welded to the inner side ofthe singeing bar,

These T space for the shanks oi the anchors, that is,

the portions or" the anchors extending at right angles to the smgemgbar. The two parts are further each provided with a groove 20 extendingparallel with its length and in position to receive the laterally bentends 18 of the anchors. In assembling the singeing bar and lnsulatorsthe insulators are placed over the anchors and then clamped togetherbetween the supports 14 and 15 whereby the slngeing bar is securedthereto. This support for the singeing bar holds it securely throughvout its entire length so that it is impossible for the bar to becomedistorted by changes in temperature. It is highly essential that the barbe absolutely straight at all times in order to provide for uniformsingeing of the goods.

Preferably also the singeing bar is provided with a longitudinal centralridge coming to a blunt point or edge. As shown in Figs. 6 and 7, thebar consists of a strip of metal having a rectangular cross-section andhaving ltS'SlClQS bent over from the center 7 p 7 very slightly so tohave an open V cross mountedon aseries of blocksll, 12 and 13 section,the-bar being arranged on the support so that the ridge or edge 21 is onthe outer side on the singeing surface. The ob ject of so shaping thesingeing bar is to provide for contact between the cloth andsubstantially the entire width of the bar in spite of any irregularityin its position. It will be observed that with this shape the bar may betipped forwarder backward somcwhat, that is, moved about an axisparallel withits length withoutmaterially changing the width of thecontact surface with the cloth, whereas if a flattened singei'n surfacewere used a slight tipping displacement of the bar with relation to theplane of the cloth would result in edge contact only. v

A short fiat section isprovided at each end of t-h-e'bar to provide forthe connection of electrical terminals. 1 These terminals consist ofsubstantially rectangular metallic members 22, shown in Fig. 5, whichhave their ends connected to the inner side of the sin'geing bar at theends thereof. A rectanwith the bars.

Ti l, the low voltage secondary terminals gular metal plate 23 is alsosecured in the angle atthe junction between the tcrn'iinal and the barso as to form a bracket and provide tor a more rigid joint. This platealso atl'ords an additional path for the elec tric current whereby theconductivity at th point is increased, and as a result the heating ofthe terminals decreased. As shown in Fig. 3, the plate 23 extends intothe rocess be- .tween the insulating blocks, whereby warping isprevented. Preferably the connections between the parts 22 and 28 andthe bar ar made by welding, a metallic plate being placed on the bar ateach end to provide addit-iona'l stock whereby the welding operation isfacilitated and the electrical conductivity further increased.

A low voltage electric runnt suliicieut to heat the bar to the desired rgeing temperature supplied by means of a transformer oit whichareconnected to the terminals 22. As shown the transformer comprises anelongated, rectangular magnet iron core T he secondary winding of thetransformer, as

shown, consists of a pair of heavy copper .mary winding 27 is alsomounted on the core. It vill be observed that the singeing bar and itsinsulating support together with the transformer 24 lfolli] a compactunitary device.

'Inusing JL'AO singeing device, it is sup ported in a suitable frameworkcooperating; with the supporting clamps l4 and 15. As

' lateral lugs :28 are provided on the land so that the device may be Ael between two parallel members of a framework which are embraced by thehi s i'rtypieal installation oi sinv c in completesingeing apparatus isshown diagrammatically in 2. lf'ho s ngeing device: are on lied in twogroups 29 and 30 ces each, the d vices in each group b space-dvertically one above the ot-l'ier. The cloth to be singed is :l oversuitable rollers on a movable 11221110 work 32 so as to pass l the framework in two vertical lengths no and The framework .32 m y be movedforward to ward the right as shown in the drawing until these verticallengths of cloth engage the heatedsurfaces of the singeing bars, andwhen desired the framework may be moved backward toward the l'" 1e Thisa for the heating of the bar prior to ei ,me nt with the cloth. In otherwords while the bars are being heated the framework will be moved to theleft, and after the bars have been thought up to the desired singeingtemperature the framework will be moved toward the right to bring thecloth into engagement with the bars and the cloth fed through thesingeing apparatus. It will be observed that the two groups 29 and 30 ofthe singeing devic *s are arranged to singe opposite sides of the cloth.

Preferably cooling means is provided for the terminals 22. As shown inFig. 5 the blocks are each provided with a duct 35 through which coolingwater circulated.

It will be observed that the singeing bar 10 is relatively thin ascompared with its width whereby the cross section is reduced sothat'sutiicient resistance is obtained to give the desired heatingell'i'ect. Furthermore this shape oil the bar provides for thegeneration oi? the heat near the singeing surface. The bar furtherarranged so that it is held very rigidly to withstand the pressure ofthe cloth against it and to prevent warping. It will be observed thatthe anchor members 17 are free to slide laterally in the recesses in thesupporting insulators in accordance with the longitudinal expansion andcontraction of the bar 10. The bar is thus rigidly supported but at thesame time it is free to expand and contract. i

VV'hile I have described myi-n-vention as embodied in concrete formandas operating in a specific manner in accordance with the provisions ofthe patent statutes, it should be understood that I do not limit myinvention thereto since various modifications thereof willsuggestthemselves tothose skilled in the art without departing from the spiritof my invention the scope of which set forth in the annexed claims.

That I claim as new and desireto secure by Letters Patent of the UnitedStates, is,-

1. A singeing element for cloth singeing machines comprising a barprovided with a central longitudinal ridge on one side forming asingeing surface, an insulating support for said bar, and means forslidably securing said bar at intervals to said support so that said barmay move lengthwise of said support.

tive longitudinal movement, and'means for passing an electric heatingcurrent through said bar.

8. A singeing element for cloth singeing machines comprising anelectrically insulating support, an electrically conducting barextending lengthwise of said support, recesses in said support, anchormembers secured at intervals to said bar interlocking with said supportin said recesses, and means for passing an electric heating currentthrough said bar.

4:. A singeing element for cloth singeing machines comprising a bar, anelectrically insulating support for said bar provided with alongitudinal recess, and holding members secured at intervals to theinner side of said bar and extending into said recess into interlockingengagement with said support, said holding nembers being free to slidein said recess in accordance with longitudinal expansion and contractionof said bar.

5. An electrically heated singeing element comprising a bar, a supportfor said bar extending lengthwise thereof comprising a pair ofelectrically insulating members provided with registering recesses,holding members secured at intervals to the inner side of said bar andextending into said recesses into interlocking engagement with saidholding members so as to hold said bar in lengthwise engagement withsaid support, a primary winding, a magnet core therefor, and aconducting bar interlinking with said core having its ends connected tothe ends of said bar.

6. A singeing element for cloth singeing machines comprising a barinclined. from the center on one side to form a singeing surface, anelongated electrically insulating support extending lengthwise of saidbar in engageinent therewith, said support being provided with. recessesand anchor members secured to said bar at intervals and cooperating withsaid recesses for holding said bar to said support.

In witness whereof, I have hereunto set my hand this 1st day of October,1926.

ALBERT N. OTIS.

